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Bruxism is repeated activity of the jaw muscles that can include clenching or grinding the teeth, or holding the jaw in a fixed or pushed-forward position. It can happen during sleep or while awake.
Sleep and awake bruxism are not the same behavior
The current international consensus treats sleep bruxism and awake bruxism as separate behaviors because they happen in different states. Sleep bruxism is jaw-muscle activity during sleep. Awake bruxism is jaw-muscle activity while awake, often involving repeated tooth contact, clenching, or bracing the jaw.
In otherwise healthy people, bruxism is not automatically classified as a disorder. It can still matter when it contributes to tooth wear, broken dental work, jaw discomfort, or other consequences. The behavior and its effects need to be considered separately.
What might make someone notice it?
Some people notice daytime clenching. Sleep grinding is harder to observe directly, so the first clue may come from a bed partner or from changes noticed by a dentist. Possible signs include:
- grinding or tapping sounds during sleep;
- jaw soreness, tightness, or tired chewing muscles;
- tooth wear, chips, cracks, or damaged dental work;
- tooth sensitivity or morning headaches;
- marks along the tongue or inside the cheeks.
None of these signs confirms bruxism on its own. Similar symptoms can have other explanations, and people can have bruxism without obvious symptoms.
How bruxism is assessed
A dentist may ask about symptoms and habits, examine the teeth and jaw, and look for changes over time. Reports from a partner, a diary, audio recordings, or wearable sensors can add information, but each method captures only part of the picture.
The 2025 international consensus emphasizes structured assessment across a person’s report, a clinical examination, and instrumental methods when appropriate. A sound recording may support awareness, but sound alone cannot show every form of jaw-muscle activity or establish a diagnosis.
About GrindMute: GrindMute looks for possible teeth-grinding sounds and saves short clips for review. It does not diagnose or treat bruxism. It may miss grinding sounds or save unrelated sounds.
What to do if you are concerned
Talk to a dentist if you notice persistent jaw pain, tooth damage, sensitivity, frequent morning headaches, or repeated grinding sounds. Bring specific observations rather than trying to decide the diagnosis yourself. A timeline of symptoms or a few clear audio clips may help describe what prompted the conversation.
For practical guidance, read when to talk to a dentist about teeth grinding. You can also review the GrindMute FAQ for the app’s intended use and detection limits.
Sources
- National Institute of Dental and Craniofacial Research: Bruxism
- NHS: Teeth grinding
- International consensus on the assessment of bruxism, 2025
This article is for general information. It was prepared by GrindMute Editorial and has not been presented as medically reviewed. It does not provide diagnosis or treatment advice.